Information concerning the total number of voting rights and shares, provided pursuant to article L. 233-8 II of the Code de

PR Newswire/Les Echos/

Information concerning the total number of voting rights and shares, provided pursuant to article L. 233-8 II of the Code de commerce (the French Commercial Code) and article 223-16 of the Règlement général de l'Autorité des Marchés Financiers (Regulation of the French stock market authority)

SANOFI a French société anonyme with a registered share capital of 2,644,212,730 EUR Registered office : 54, rue La Boétie - 75008 Paris - France Registered at the Paris Commercial and Companies Registry under number 395 030 844

Number of real Theoretical number of Date Total number of voting rights voting rights

                 issued shares         (excluding         (including
                                        treasury            treasury 
                                         shares)           shares)*  

October 31, 2012 1,323,530,112 1,463,011,545 1,466,206,717

* Pursuant to article 223-11 of the Règlement général de l'Autorité des Marchés Financiers.

This information is also available on the internet website of sanofi under " Regulated Information in France ": http://en.sanofi.com/investors/regulated_info_france/regulated_info_france.asp

Investor Relations Department Europe Tel: + 33 1 53 77 45 45 US Tel: + 1 908 981 5560

                           e-mail: IR@sanofi.com 
                         Media Relations Department
                          Tel: + 33 1 53 77 46 46
                           e-mail: MR@sanofi.com

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-0- Nov/26/2012 13:48 GMT